Error with RPC calls

[d-waters]

All RPC calls are giving me the following error.

{"error":{"code":-32603,"message":"Serializer doesn't support this type of serialization: Object expected."},"id":"1","jsonrpc":"2.0"}

[rs-blashyrkh]

Try using named parameters instead of positional ones.

[d-waters]

Well that gets me somewhere, but now I am getting - Unable to get check for new block template: Issue getting block template: {"error":{"code":-4,"message":"Failed to parse wallet address"},"id":"0","jsonrpc":"2.0"}